Carl Winberg, (born 6 July 1867 in Karlstad, died 22 February 1954 in Stockholm) was a Swedish communist politician and newspaper editor.

Winberg was worked as a locomotive cleaner from 1891 to 1906 and belonged to the Kilboms faction in the Swedish Communist Party.

He was from 1911 to 1914 a Member of Parliament (social democrat) in the Swedish Riksdag's lower house (also known as Andra kammaren or Second Chamber) for the Stockholm City constituency and from 1912 till 1914 for Stockholm City second constituency.

From the early Riksdag from 1919 to 1930 (communist) Winberg belonged to the upper house of the Riksdag (första kammaren or First Chamber) for the constituency of Norrbotten County until 1921 and from 1922 onwards, he served the constituency of Västerbotten and Norrbotten County.

In the 1930s, Winberg was active in the Communist opposition led by Karl Kilbom, independent from Moscow and opposing Stalinism.